Orthoptera from the River Ogove. 261 



it are two pairs of shallow brownisli depressions, and behind 

 it a row of 5 on each side, curving outwards, and 2 or 3 

 additional pairs in the middle. Abdomen smooth, more or 

 less cupreous, with some scattered punctures towards the end 

 of the segments. 



Much resembles G. ermaceus, Fairmaire, from the Gaboon, 

 but only half the size. Described from two males and one 

 female, which hardly differ in structure, thus making it 

 probable that the insect alluded to by Dr. Karsch as the 

 iemale of Cosmoderus ermaceus (Berl. ent. Zeitschr. xxxi, 

 p. 59) belongs to a different genus, and not improbably to 

 Aprophantia, described below. 



The curious wingless insects belonging to the family 

 Hetrodidffi must be very numerous in the warmer parts of 

 Africa. Almost every collection from these regions, how- 

 ever small, furnishes one or more new species if it contains 

 any Orthoptera. I take the opportunity of adding the 

 description of a new genus and species, which appears to 

 have been confounded with Cosmoderus erinaceus, in a 

 footnote *. 



* Aprophantia, gen. nov. 



Allied to Cosmoderus, but with longer and more slender legs, the hind 

 tibife especially being considerably longer than the others. All the tibiae 

 sulcated, front tibiae with conspicuously open foramina. Femora above 

 with a strong pair of terminal spines ; femora and tibiae otherwise un- 

 armed above, but with a double row of very strong spines beneath. 

 Frontal spine very strong ; front coxae spined, and a spine in front of 

 the middle tarsi. 



Abdomen smooth ; mesothorax raised in the middle, its front angles 

 armed with a large double spine, from which a strong carina runs to the 

 sides of the ridge, where the carina rises into another large spine ; the 

 hinder part of the mesothorax is armed with a row of 9 or lOmore strong 

 spines, extending on each side nearly to the level of the front coxae. 



Aprophantia maculata, sp. n. (PI. XII. fig. 8.) 



Long. Corp. 38-48 millim. 



Testaceous yellow (probably gi-een during life) ; the tips of the spines, 

 a double row of spots more or less complete on both sides of the femora, 

 and a patch over the foramina on the front tibiae black. Antennae testa- 

 ceous, with 5 long black bands increasing in length, the last terminal. 

 Male with some obsolete brown markings on the face, two rumiing up 

 from above the frontal horn, and one on each side beyond, augidated 

 outwards. The male also has some obsolete depressed brown marks on 

 the front and sides of the thorax above, nearly as in the species of true 

 Cosmoderus. In the female these markings are wanting, and the colour 

 is darker, especially at the sides of the thorax, the front and back of the 

 abdomen, and towards the extremities of the tibiae, and along their 

 carinae. The male has three pairs of spines on the femora beneath and 

 two additional spines on the outer carina of the hind femora, and six pairs 



